Python Package

wslsg

　　The ‘__init__.py’files are required to make Python treat thedirectories as containing packages; this is done to preventdirectories with a common name, such as ‘string’
　　, fromunintentionally hiding valid modules that occur later on the modulesearch path. In the simplest case, ‘__init__.py’can just be anempty file, but it can also execute initialization code for thepackage or set the __all__variable, described later.
　　要创建python包，必须创建__init__.py，只要文件夹下面有这个文件，哪怕是一个空文件，python就认为这是一个包，而不是文件夹。
　　引用自:An Introduction to Python